Download Inkscape Source
See CompilingInkscape for troubleshooting help.
For those wishing to use the latest and greatest "bleeding edge" features and willing to risk more instability, or those wishing to test out the newly added code to help identify and debug problems in the code, access is provided to the development versions. Use at your own risk, and please report bugs you find!
Precompiled package for Ubuntu : PPA for Ubuntu has nightly builds of Inkscape from trunk.
Source Code Packages
You can also obtain the source code and compile it yourself :
bzr branch lp:inkscape
Some of the packages have been signed by the packager. Here is where to find their GPG public keys: